Elevator-lock



(No Mbdel.)

M. J. DALY. ELEVATOR 1100K.

2 Sheets-Sheet 1.

' No. 590,967; Patexited Oct. 5, 1897.

,Lzvaniov. Michael fp zz Ti T1 (No Model.) 2 sheets s heet 2.

M. J. DALY. q ELEVATOR LOOK.

No. 590,967. Patented Oct. 5,1897.

71 z'inzgseg. ZZZ/anion W mama y m IhvrTEn STETEE PATENT @EETCE.

MICHAEL J. DAL Y, OF PIT'ISBURG, PENNSYLVANIA.

' ELEVATOR-LOCK.

SPECIFICATION forming part of Letters Patent No. 590,967, dated October5, 1897. Application filed April 6,1896. erial No. 586,386. on) model.)

To LLZZ whom it 7mm concern- Be it known that I, MICHAEL J. DALY, acitizen of the United States of America, residing at Pittsburg, in thecounty of Allegheny and State of Pennsylvania, have invented certain newand useful Improvements in Elevator-Looks, of which the following isaspecification, reference being had therein to the accompanyingdrawings.

This invention relates to certain new and 1 useful improvements inelevator-locks, and} has for its object the provision of new and novelmeans whereby the elevator-cage will be locked at each floor when thedoor is opened and prevented from ascending or descending until the dooris again closed.

A further object of the invention is to construct an elevator-lock ofthe above-described class that will be entirely automatic in itsoperation, locking the car when the door is opened and releasing thesame when the door is closed, thus preventing many accidents causedbythe elevator-car moving either upward or downward while the door isopen.

A still further object of the invention is to construct an elevator-lockthat can be applied either to a sliding or swinging door or to anelevator-gate, and that will be extremely simple in its construction,strong, durable, effectual in its operation, and comparativelyinexpensive to manufacture.

With the above and other objects in view the invention finally consistsin the novel construction, combination, and arrangements of parts to behereinafter more specifically described, and particularly pointed out inthe claim.

In describing the invention in detail reference is bad to theaccompanying drawings, forming a part of this specificatiomand whereinlike letters of reference indicate similar parts throughout the severalviews, and in whicha portion of the .rod, showing the operating arm androller. Fig. 6 is a similar view showing the application to a swingingdoor. Fig. 7 is a side view ofthe upper portion of the rod, showing theretracting-spring.

In the drawings, (1 represents a vertical rod which is suitably locatedin the elevator-shaft, its position being largely determined by thenature of the doors employed.

In Fig. l of the drawings, wherein'the application to a sliding door isshown, the rod a is located near the centerof the width of theelevator-shaft, and is provided at'each floor with arms I) b, carryingin their free ends rollers c c. The vertical rod or is secured at thetop of the elevator-shaft in a bearing d, and is supported atilslowerend byabracket or stand a. On the shaft f, which carries theoperating-sheave g, around which passes the hand controller-rope, isprovided a cog-wheel h, and to the brace or stand i-of the operating-shaft is, pivotally attached a dog 3', having a weighted end j, andthe other extremity provided with a catch 70, adapted to engage thecog-wheel h, secured on the shaft f. To the stand 2' is pivotallysecured a bell-crank l, the horizontal arm of which is connected by arod Z to the upper end of the dogj, and the vertical arm is connected bya rod m to an arm 07., secured on the rod a. This rod m is formed with aspiral portion 0 at any suitable point throughout its length, which isshown in Figs. 2 and 4 as at or near the middle of the rod.

In Fig. 2 of the drawings I have shown the application of my improvedelevator-lock on a swinging door, and in the View the rod (1 is shown asbeing located near the corner of the elevator-shaft, and the rod a isprovided with arms 1) 1), adapted to engage the door when same is openedand turn the rod, and in the application to a door in the form of agate,

as shown in Fig. 3, a cam 11 is provided on the gate and engages theroller 0 of the arm I) when the gate is raised and operates the rod inthe same manner as in the other construction s, as will be hereinaftermore specifically described. Near the top of the rod or in eachof theconstructions-is secured a spring q, having its other end-secured to thecasing or framework of the elevator-shaft and serving to return the rodto its normal position.

, The operation of myimproved elevator-lock will be readily apparentfrom the views of the same which I have shown in the drawings, but toenable those unskilled in the art to more clearly understand the same Iwill describe the operation, as follows: We will as sume that all theparts have been secured in their respective positions and that the lockis applied to an elevator equipped with the sliding doors. When the dooris closed, it will be out of engagement with the arms I) 1), allowingthe car to ascend and descend without interruption. When the door isopened, however, it will immediately engage the rollers of the arms I)b, and the pressure against the same will cause the rod to turn in itsbearings, which will operate the rod m, bellcrank l, and rod Z, drawingthe catch it of the dog j into engagement with the cog-wheel 72, lookingthe operating-shaft and preventing the car from ascending or descending.By means of the rollers c c and the arms I) b, which may be of rubber orother flexible material, if so desired, very little resistance isoffered to the operator in opening the door, while at the'same timeeffectually operating the rod to throw the dog in engagement with thecog-wheel and lock the door. In closing the door as soon as the same haspassed the point of contact with the rollers the weighted end 7" of thedog will withdraw the catch of the dog from engagement with thecog-wheel h, and the spring g at the top of the rod will assist inreturning the rod a to its normal position.

It will be observed that the operation of the swinging door issubstantially the same as that given above for the sliding door-,thedoor engaging the arms I) b when opened and turning the rod a, throwingthe dog into engagement with the cog-wheel in the same manner, and inthe application to the sliding gate the rod a is turned by reason of thecam p coming in contact with the roller of the arm and the dog placed inengagement with the cog-wheel in the same manner.

It will also be observed that the sliding door may also carry a camoperating against the rollers of the arms in a similar manner to thatshown and described for the vertically-sliding gate, and I therefore donot wish to limit myself to the exact construction as herein shown anddescribed, as it will be noted that this and various other changes maybe made in the details of construct-ion without. departing from thegeneral spirit of my invention.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is

In an elevator, the combination of the controlling rope or rod, theelevator-shaft, floordoors, and a vertical rod supported in fixedbearings so as to rock or turn and extending lengthwise theelevator-shaft, said rod being provided with radial arms adapted to bestruck by the floor-doors when the same are opened, and beingindependent of the controller rope or rod, and provided with connectionsat or near its lower end for locking the valve-operating devices.

In testimony whereof I affix my signature in presence of two witnesses.

MICHAEL J. DALY. Witnesses:

ALFRED M. WILsoN, H. E. SEIBERT.

